Improvement in packings for steam and other pistons



w. A'DAIBQ 7 Packing for Steam and Other Pistons. 7 N0 155 059, PatentedSept.1 5,1874.

UNITED STATES PATENT QEEIOE.

WILLIAM EAIE, E BOWLING GREEN, KENTUCKY, ASSIGNOR OE THREE- FOURTHS HISRIGHT TO THOMAS H. EINES, JAMES MONTGOMERY, AND JAMES H. WILKERSON, OESAME PLACE.

IMPROVEMENT IN PACKINGS' FOR STEAM AND OTHER PISTONS.

Specification forming part of Letters Patent N 0. 155,059, datedSeptember 15, 1874; application filed August 4, 1874.

To all whom it may concern:

Be it known that I, WILLIAM ADAIR, of Bowling Green, in the county ofWarren and State of Kentucky, have invented certain new and usefulImprovements in Packing for Steam and other Pistons; and I do herebydeclare that the following is a full and exact description thereof,reference being had to the accompanying drawings making a part of thisapplication. Q

My invention relates to piston and other steam or hydraulic packings. Ithas for its object to produce a metallic packing which shall be durableand efficacious; and to these ends my invention consists of two or moresectional metallic rings secured in place and adapted to compensate forwear by encircling springs, as will be hereinafter more fully set forth.

To enable those skilled to more fully under stand the same, I willproceed to describe the same, referring by letters to the accompanyin gdrawing, which represents a packing for a piston-rod of asteam-engine.

Figure 1 is a longitudinal section of a gland and stufling-box, showingan ordinary steampiston in relief, and the upper half of thepacking-rings in plan view; and Fig. 2 is a face or side view of one ofthe packin g-rin gs.

Similar letters designate like parts in both figures.

A is an ordinary gland, with suitable holes a a for the passage of thestufling-box bolts,to which it is secured in the ordinary manner, andthe central hole for the movement of the piston B. The gland A has theusual short cylinder projection C, which comes in contact with the boxD, and thus forms the cylindrical space through which the piston movesand is packed. The box D is formed with a partition, which extendstoward the center to a distance equal to the hole in the gland throughwhich the piston moves. This partition forms an annular shoulder,against which one of the packing-rings lies, while the other liesagainst the gland, so that both may be clamped and confined againstlongitudinal movement. The packing-rings are composed of sections,forming what are known as cut joints, and they are held in place by aribbonspring traveling spirally around the flanged set E. Suitable spaceis provided between the ends of the sections to allow for the action ofthe spring and the lessening of the diameter of the rings. Within thebox D, and between the partition E and the inside face of the gland, andupon the piston-rod B, are placed two of these packing-rings, and theyare so arranged relatively to each other that they shall break thejoints of the flanged sections of each, and thus prevent the escape ofsteam through them. In order to maintain the two rings in this relationand yet permit radial expansion and contraction, I provide on one ormore of the flanged sections of one ring a dowel-pin, b, and in one ormore of the flanged sections of the other ring are formed radial slots0, so that the two rings are prevented from changing their relationaxially, while at the same time they may contract or expandindependently of each other radially. I have shown the springs ascomposed of a ribbon wound around like a snake coil, and deem this thebest manner of making them, as greater elastic force is obtained. Itwill be observed that the whole diameter of the rings, with theirencircling retainingsprings, is somewhat less than the interior of thebox D G, the object of which is, that any steam which may be confinedbetween the springs and the interior of the box will tend to compressthe springs, and thus hold the packing-ring sections close down oraround .thepiston-rod B. I have shown a third ring arranged on the otherside of the partition E as an auxiliary packing, and it is obvious thatas many may be used as thought desirable. It will readily be understoodthat the packing-ring I have shown as applied to the stufling-box andpiston of a steam-engine may be used in connection with pumps, or

wherever it is desirable to form a tight packing for a moving piston orrod.

Having described my invention so that those skilled can full yunderstand the same, what I claim as new, and desire to secure byLetters Patent, isl 1. In combination with a sectional ring, as

' above described, and having a radial slot in one or more of itsflanged sections, a similar ring having a dowel-pin upon one or more ofits sections, whereby any number may be held in a given axial relationto each other, substantially as and for the purpose set forth.

WILLIAM ADAIR.

In the presence of-- WM. P. PAYNE, G. B. PAYNE.

